No problems with the roots. I change the water every 5 to 7 days. I stayed with the simple nutrients and measured carefully. Occasionally the leaves would wilt after changing the nutrients. But, otherwise, Ive had no probs. The leaves seem to kick back up after one day. Since I am using the standard Home Depot 36" wide-white cabinet, I spray regular bug spray (Raid for Flying Insects) every two weeks underneath the cabinet. I have also been collecting Lady Bugs in my back yard and putting them on the plants. I found about 4-6 does a good job, but I really havent encountered a pest problem. I'm using the simple test strips to measure the acid levels. The water in my area is low on the PH scale so I add PH DOWN to raise the acid level. The PH was the pain because everyone talks about the PH levels being to high. What is confusing is that PH DOWN actually raises the ACID level. I have a friend who is a soil chemist and he had to explain this to me when I was having trouble with my acid levels in my Spa. I just checked my plant (I pulled out the three males days ago) and my acid levels were very low, extremely low tonight. Keeping the acid levels correct helps the absorption of nutrients. I was wondering why my female was looking great however bud production (flowering) was slowly advancing. I just added PH down tonight to get the acid levels up. I expect this to help. Hopefully we will have more friends respond in a positive way and not paint cannabis users as stupid dumb frucks. Thanks for asking my opinion!!